Fixing Structure and Heat Dissipation Device

Abstract

A fixing structure includes a back plate, a fixing plate, a first elastic element, a second elastic element and a fastener. The back plate has a positioning pillar thereon. The fixing plate presses a heat dissipation element to allow the heat dissipation element to contact a chip above the back plate. Both the first elastic element and the second elastic element are connected to the fixing plate. The fastener fastens the first elastic element and the second elastic element to the positioning pillar or just fastens the first elastic element to the positioning pillar to allow the second elastic element to be suspended. Furthermore, a heat dissipation device employing the fastening structure is also disclosed.

1 . A fixing structure applied to a heat dissipation element, the fixing structure comprising:
 a back plate having at least a positioning pillar thereon;   a fixing plate pressing the heat dissipation element to allow the heat dissipation element to contact a chip above the back plate;   at least a first elastic element connected to the fixing plate;   at least a second elastic element connected to the fixing plate; and   at least a fastener for fastening the first elastic element and the second elastic element to the positioning pillar or only fastening the first elastic element to the positioning pillar to allow the second elastic element to be suspended.   
   
   
       2 . The fixing structure according to  claim 1 , wherein when the fastener fastens the first elastic element and the second elastic element to the positioning pillar together, the first elastic element and the second elastic element have different compression strokes. 
   
   
       3 . The fixing structure according to  claim 1 , wherein the fastener is a screw. 
   
   
       4 . The fixing structure according to  claim 3 , wherein both the first elastic element and the second elastic element have screw holes. 
   
   
       5 . The fixing structure according to  claim 4 , wherein the screw hole of the first elastic element has a margin along the direction of being away from the fixing plate. 
   
   
       6 . The fixing structure according to  claim 4 , wherein when the first elastic element and the second elastic element are not fastened to the positioning pillar, a height difference is between the screw hole of the first elastic element and the screw hole of the second elastic element. 
   
   
       7 . The fixing structure according to  claim 1 , wherein the section area of the first elastic element is different from the section area of the second elastic element. 
   
   
       8 . The fixing structure according to  claim 1 , wherein the first elastic element, the second elastic element and the fixing plate are integrally formed. 
   
   
       9 . The fixing structure according to  claim 1 , wherein the first elastic element and the fixing plate are integrally formed. 
   
   
       10 . The fixing structure according to  claim 1 , wherein the second elastic element is riveted to the fixing plate. 
   
   
       11 . A heat dissipation device comprising:
 a back plate having at least a positioning pillar thereon;   a temperature homogenizing element contacting a chip above the back plate;   a heat pipe contacting the temperature homogenizing element;   a fixing plate having a recess for holding the heat pipe;   at least a first elastic element connected to the fixing plate;   at least a second elastic element connected to the fixing plate; and   at least a fastener for fastening the first elastic element and the second elastic element to the positioning pillar or only fastening the first elastic element to the positioning pillar to allow the second elastic element to be suspended.   
   
   
       12 . The heat dissipation device according to  claim 11 , wherein when the fastener fastens the first elastic element and the second elastic element to the positioning pillar together, the first elastic element and the second elastic element have different compression strokes. 
   
   
       13 . The heat dissipation device according to  claim 11 , wherein the fastener is a screw. 
   
   
       14 . The heat dissipation device according to  claim 13 , wherein both the first elastic element and the second elastic element have screw holes. 
   
   
       15 . The heat dissipation device according to  claim 14 , wherein the screw hole of the first elastic element has a margin along the direction of being away from the fixing plate. 
   
   
       16 . The heat dissipation device according to  claim 14 , wherein when the first elastic element and the second elastic element are not fastened to the positioning pillar, a height difference is between the screw hole of the first elastic element and the screw hole of the second elastic element. 
   
   
       17 . The heat dissipation device according to  claim 11 , wherein the section area of the first elastic element is different from the section area of the second elastic element. 
   
   
       18 . The heat dissipation device according to  claim 11 , wherein the first elastic element, the second elastic element and the fixing plate are integrally formed. 
   
   
       19 . The heat dissipation device according to  claim 11 , wherein the first elastic element and the fixing plate are integrally formed. 
   
   
       20 . The heat dissipation device according to  claim 11  further comprising a rivet for riveting the second elastic element and the fixing plate.